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Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater

Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and Al(2)O(3) as a granular carrier. The mechanism of catalyt...

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Autores principales: Tang, Xi, Zhang, Yifei, Li, Weiqi, Geng, Jinju, Ren, Hongqiang, Xu, Ke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8062596/
https://www.ncbi.nlm.nih.gov/pubmed/33888754
http://dx.doi.org/10.1038/s41598-021-83804-x
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author Tang, Xi
Zhang, Yifei
Li, Weiqi
Geng, Jinju
Ren, Hongqiang
Xu, Ke
author_facet Tang, Xi
Zhang, Yifei
Li, Weiqi
Geng, Jinju
Ren, Hongqiang
Xu, Ke
author_sort Tang, Xi
collection PubMed
description Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and Al(2)O(3) as a granular carrier. The mechanism of catalytic ozonation of HA under neutral pH conditions and its efficiency were investigated. Under the chosen conditions (an ozone concentration of 2.2 mg/L, 50 mg/L HA solution, catalyst dosage of 5 g/L and initial pH of 6.49), the Cu/Ce–Al(2)O(3) bimetallic catalyst led to 54.79% TOC removal rate after 30 min; the removal rate by ozone alone was only 20.49%. The characteristics of organic compounds determined by FT-IR and GC–MS showed that organic compounds were degraded significantly by the catalytic treatment. The addition of catalysts could effectively degrade toxic intermediates and reduce the acute toxicity produced by ozonation. Humic acid substances were largely removed and transformed into biodegradable intermediates. This study proposes a new and efficient ozonation catalyst for practical applications in advanced wastewater treatment.
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spelling pubmed-80625962021-04-27 Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater Tang, Xi Zhang, Yifei Li, Weiqi Geng, Jinju Ren, Hongqiang Xu, Ke Sci Rep Article Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and Al(2)O(3) as a granular carrier. The mechanism of catalytic ozonation of HA under neutral pH conditions and its efficiency were investigated. Under the chosen conditions (an ozone concentration of 2.2 mg/L, 50 mg/L HA solution, catalyst dosage of 5 g/L and initial pH of 6.49), the Cu/Ce–Al(2)O(3) bimetallic catalyst led to 54.79% TOC removal rate after 30 min; the removal rate by ozone alone was only 20.49%. The characteristics of organic compounds determined by FT-IR and GC–MS showed that organic compounds were degraded significantly by the catalytic treatment. The addition of catalysts could effectively degrade toxic intermediates and reduce the acute toxicity produced by ozonation. Humic acid substances were largely removed and transformed into biodegradable intermediates. This study proposes a new and efficient ozonation catalyst for practical applications in advanced wastewater treatment. Nature Publishing Group UK 2021-04-22 /pmc/articles/PMC8062596/ /pubmed/33888754 http://dx.doi.org/10.1038/s41598-021-83804-x Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Tang, Xi
Zhang, Yifei
Li, Weiqi
Geng, Jinju
Ren, Hongqiang
Xu, Ke
Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater
title Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater
title_full Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater
title_fullStr Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater
title_full_unstemmed Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater
title_short Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al(2)O(3) system aiming at degradation of humic acid in real wastewater
title_sort mechanism and toxicity evaluation of catalytic ozonation over cu/ce–al(2)o(3) system aiming at degradation of humic acid in real wastewater
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8062596/
https://www.ncbi.nlm.nih.gov/pubmed/33888754
http://dx.doi.org/10.1038/s41598-021-83804-x
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